Although cocophilus is undeniably close to other species in the genus Bursaphelenchus (and may well prove to belong to that genus), there remains some. Bursaphelenchus cocophilus. Red Ring Nematode. Synonym: Rhadinaphelenchus cocophilus. Rhadinaphelenchus was designated a junior. The red ring nematode, Bursaphelenchus cocophilus, was first described by Cobb. () as Aphelenchus cocophilus from specimens in.
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Aboutsee text. Control is based on prevention rather than cure either by the destruction of infested palm material by cutting and burning, or by the injection of herbicides and burning, or by trapping and killing of the weevil vectors before they spread the nematodes. From Wikipedia, the free encyclopedia.
Palms that are already infected and dying from red-ring disease give off a chemical that attracts even more weevils Giblin-Davis et al. The core tissue generally shows a red cylinder of necrotic tissue.
In other projects Wikispecies. These baskets are filled with chunks of fresh tissue from diseased coconut trees to attract the weevil.
Agricultura y Ganaderia Tropical, Peru, bursaphelenhus West Indies, South and Central America. Don’t need the entire report? More information about modern web browsers can be found at http: Nematodes of Tropical Crops. Economic Importance Back to Top In Trinidad, red ring disease kills 35 percent of young coconut trees.
Texas Invasive Species Institute
Diagnosis Top of page Recovery of R. The life cycle of Bursaphelenchus cocophilus lasts nine or ten days. Descriptions of Plant-parasitic Nematodes, Set 5 No.
They do so by attracting and killing palm weevils which may enter the plantations from nearby diseased trees. The heaviest concentration of nematodes can be found within a foot of the highest part of the internal red ring that is a classic symptom of red ring disease; as many as 50, have been found in 10 grams of infected stem tissue Esser Considering that more than eight million acres of coconut palms are grown, red ring nematodes are one of the most important pests in the tropics.
Accordingly, being a species of economic importance with an established literature, it is perhaps more prudent to leave it in Rhadinaphelenchus until a wider consensus is achieved. Habitat Top of page R. There is some evidence to suggest that nematodes may persist in beetle larvae through molts, but this is unclear. Guard baskets remain for about 2 weeks, after which the tissue and insecticide in the basket should be burnt.
Esser says in litt. The discrete spots are also brown and the yellow discoloration of the leaves is not often apparent. Although cocophilus is undeniably close to other species in the genus Bursaphelenchus and may well prove to belong to that genusthere remains some doubt as to which genus it should belong to. Generate a print friendly version containing only the sections you need.
The palm weevil, Rhynchophorus palmarumis the vector of the nematode and life stages of R.
Rhadinaphelenchus cocophilus (red ring nematode)
To view an adult Bursaphelenchus cocophilus click here Ecological Threat Bursaphelenchus cocophilus cocopbilus serious damage to coconut palms in the Neotropic region and also in Brazil where it is vectored by the weevil Rhincophorus palmarum. Nuts are shed prematurely, either simultaneously with the development of leaf symptoms, or slightly before.
This page was last edited on 10 Octoberat Trapping Traps or guard baskets are designed to protect plantations from frequent outbreaks of R. Native Origin Native Origin: At the onset of symptoms, the chlorotic yellow appearance of the leaves around the stem is sometimes indistinguishable from those of trees growing under conditions of poor drainage or during intense drought.
This aggressive phytosanitation is the best chance to halt the spread of red ring disease to other nearby trees. These nematodes are phoretic, dispersed between trees when their cocophilsu larvae are transported by insects.
These nematodes reproduce sexually and have a 10 day life cycle, and can migrate and survive in soil, especially moist areas. Symptoms Top of page Young coconut palms easily succumb to R. Generally, advantage is taken of the level of activity of the nematode during extraction methods.
They do so by attracting and killing palm weevils bursaphelencuus may enter the plantations from nearby diseased trees. The disease occurs more commonly in trees 2.
When the weevils mature, bursaphelenhcus leave the palm with new batches of third-stage larval nematodes ready to infest a new tree. External symptoms can take up to two months to appear. The role of the palm weevil, Rhynchophorus palmarumas a vector of red ring disease of coconuts.